See your concrete in liters.
⚙️Calculation Parameters
📊Calculated Output
How Sonotube Liters Calculator Works?
To get a Sonotube concrete quantity in liters (L), the calculator finds the cylinder volume and multiplies it by 1,000 L per cubic meter (m³). The process takes 4 steps.
Enter tube size
Type the diameter and depth in inches or centimeters (cm). Liters suit small forms from 4 in (10 cm) to 12 in (30 cm).
Calculate volume
The calculator applies the cylinder formula in meters and gets m³.
Convert to liters
The m³ value is multiplied by 1,000. One liter equals 1,000 cubic centimeters (cm³).
Compare with bag yield
Metric bag labels list yield in liters. A 25 kg bag yields about 11 L and a 20 kg bag about 9 L, so the tool shows the bag count next to the liter total.
Sonotube Liters Calculator Formula
The Sonotube Liters Calculator uses 3 conversion paths.
From centimeters
V (L) = π × (D ÷ 2)² × H ÷ 1,000D and H in cm. The result in cm³ divided by 1,000 gives liters.
From cubic feet
V (L) = V (ft³) × 28.3168One cubic foot (ft³) holds 28.3168 L.
From cubic meters
V (L) = V (m³) × 1,000One m³ holds 1,000 L.
Worked example: one 6 in × 24 in post form
- D = 15.24 cm and H = 60.96 cm
- V = 3.1416 × 7.62² × 60.96 = 11,120 cm³
- 11,120 cm³ ÷ 1,000 = 11.1 L, about 2 bags of 20 kg mix at 9 L each
Sonotube Liters Calculator Conversion Table
The liters conversion table lists small Sonotube fills at 12 in, 24 in and 36 in depths, with the 17 L yield of an 80 lb (36 kg) bag for reference.
| Tube diameter | L per 12 in | L at 24 in | L at 36 in | 80 lb bags at 36 in |
|---|---|---|---|---|
| 4 in (10.2 cm) | 2.5 | 4.9 | 7.4 | 0.4 |
| 6 in (15.2 cm) | 5.6 | 11.1 | 16.7 | 1.0 |
| 8 in (20.3 cm) | 9.9 | 19.8 | 29.7 | 1.7 |
| 10 in (25.4 cm) | 15.4 | 30.9 | 46.3 | 2.7 |
| 12 in (30.5 cm) | 22.2 | 44.5 | 66.7 | 3.9 |
One US gallon equals 3.785 L. Divide any liter value by 3.785 to get gallons.
What is Sonotube Liters Calculator?
A Sonotube Liters Calculator is a small-volume concrete tool that reports the fill of round forms in liters. Liters give readable numbers for posts, anchors and test cylinders, where cubic meters show too many zeros.
A 4 in × 12 in form holds 2.5 L, and a 12 in × 36 in form holds 66.7 L. Both values are easy to measure with a bucket or a graduated pail, which helps with hand-mixed batches.
The calculator suits metric bag users. Most 20 kg and 25 kg bags print liter yields on the label, so the liter total converts straight into a bag count.
What are the uses of Sonotube Liters Calculator?
There are 4 main uses of the Sonotube Liters Calculator.
Hand-mixed batches
DIY users measure concrete in 10 L or 20 L buckets and need the fill in liters.
Metric bag counts
Buyers divide the liter total by the bag label yield, such as 11 L for 25 kg.
Anchor and sleeve pours
Installers fill small 4 in to 6 in forms around ground anchors.
Test cylinders
Technicians check the fill of 100 mm × 200 mm sample molds, which hold about 1.57 L each.
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